Parker confident he will overcome early struggles

OAKLAND -- It didn't take too long for Jarrod Parker to reflect on how his work is going.

Parker, the A's No. 2 starter, has allowed 21 runs in 23 1/3 innings (five starts) for a 8.10 ERA this season. He threw in a pregame bullpen session Saturday with pitching coach Curt Young next to him. Parker took to Twitter for an update at around 11:45 a.m.

"Game-like"bullpen today helped to work on some stuff all while being heckled by own fans. #WillToWin Thanks to faithful, WE will succeed!